A flexible pointing material should be applied following dry fixing. Flexible pointing also has greater adhesions â€“ 20 to 30 times that of conventional bedding and pointing – as well as the ability to absorb structural movement without cracking.
The result is an attractive, water-tight, durable ridge capping that should not require maintenance or repair for many years. Initial labour costs may also be reduced making this enhanced method of fixing ridge capping on steep pitches both cost-effective and structurally superior. A range of dry fixing materials is available for other applications including valleys and bird-proofing of eaves.
Under Australian Standard AS 2050 Fixing of Roof Tiles, traditional sand-cement mortar bedding and pointing may not be used in high wind areas – that is, above 33 metres per second – without additional mechanical fixing such as clips or other fasteners. However flexible pointing should be used in wind areas without additional mechanical fixing
A layer of flexible pointing is applied over the cement work to prevent cracking and ensure long term durability.